a9s Backup Manager

This documentation describes the a9s Backup Manager service. The a9s Backup Manager is responsible for orchestrating the creation, the restoring and the deletion of Backups of Service Instances created by the a9s Data Service Framework.

TLS Communication

The a9s Backup Manager comes with TLS (HTTPS) enabled for its API by default.

note

The a9s Backup Manger is configured to listen to HTTP and HTTPS by default since some components still rely on HTTP communication with this service. HTTP will be disabled by default in coming releases.

Backup Worker

The a9s Backup Manager employs workers to manage a backup's creation, deletion, and overall status monitoring. To ensure that tasks do not block another one, the a9s Backup Manager has a minimum of four workers by default:

• One to create backups and monitor their status.
• One to monitor the status of restores.
• One to delete old backups.
• One to all tasks.

It is possible to configure these workers in the manifest using the anynines-backup-manager.workers property. The following options are supported:

• queues: A comma separated list of queue names, whose jobs are to be processed by this worker group. Please see Queues for further information.
• count: Number of workers to process the jobs in the queues. If not set, only one worker will be used.

Example:

[{ queues: "<queue-name-1>, <queue-name-2>" }, { queues: "<queue-name-3>", count: 3 }]

Queues

You can find the existing a9s Backup Manager worker queues below.

Name	Purpose
backup_all_job	Initializes a full backup of all Service Instances of all configured Service Brokers. The actual backup is not performed in this queue.
backup_agent_backups	Prepares the necessary backup information and sends the backup request to the Backup Agent of the Service Instance which should be backed up.
backup_watcher_job	Requests the status of the current backup from the Service Instance's Backup Agent. It only talks to Service Instances where a backup is currently performed.
restore_watcher_job	Requests the status of the current restore from the Service Instance's Backup Agent. It only talks to Service Instances where a restore is currently performed.
initialize_backup_deletion_job	Evaluates all Service Instances that have backups which can be deleted.
backup_deleter_job	Deletes backups from Service Instances. This only happens if there is a given amount of newer backups available.
update_instance_state_job	Asks for all instances that got deleted since the last request. The result is used to delete backups of deleted Service Instances.